Is the tracy anderson cardio workout dvd good?

I want to tone up, not lose weight and I get that you have to do cardio workouts as well as repetitions like situps and stuff. So I was wondering if the tracy anderson cardio workout is any good and if i do that along with some situps, will i get toned up? Im 17 and about 5ft 6 and im pretty slim, not quite sure how much I weigh but Id say im about the right weight for my height. I just want to get a flat stomach before the summer :D